National Weather Service United States Department of Commerce

Heavy Lake Effect Snow and Bitterly Cold Temperatures

A bitterly cold airmass will settle over much of the central and eastern U.S over the next several days. Well below normal temperatures and cold wind chills will be common. In addition, heavy lake effect snow will be possible especially downwind of Lakes Erie and Ontario, where up to one foot of additional snow is forecast by Sunday morning.
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Short Range Forecasts

Short range forecast products depicting pressure patterns, circulation centers and fronts, and types and extent of precipitation.

12 Hour | 24 Hour | 36 Hour | 48 Hour

Medium Range Forecasts

Medium range forecast products depicting pressure patterns and circulation centers and fronts

Day 3 | Day 4 | Day 5 | Day 6

Precipitation Amounts

Quantitative precipitation forecasts.

Day 1 | Day 2 | Day 3

Surface Analysis

Highs, lows, fronts, troughs, outflow boundaries, squall lines, drylines for much of North America, the Western Atlantic and Eastern Pacific oceans, and the Gulf of Mexico.

Standard Size | High Resolution

Temperature

Maximum daytime or minimum overnight temperature in degrees Fahrenheit. 

Predominant Weather

Expected weather (precipitating or non-precipitating) valid at the indicated hour.  The weather element includes type, probability, and intensity information. 

Wind Speed and Direction

Sustained wind speed (in knots) and expected wind direction (using 36 points of a compass) forecasts. 

Chance of Precipitation

Likelihood, expressed as a percent, of a measurable precipitation event (1/100th of an inch).

Precipitation Amount

Total amount of expected liquid precipitation.

Sky Cover

Expected amount of opaque clouds (in percent) covering the sky.

Alaska Graphical Forecasts

Graphical forecasts from the National Digital Forecast Database for Alaska.

Hawaii Graphical Forecasts

Graphical forecasts from the National Digital Forecast Database for Hawaii.

Puerto Rico Graphical Forecasts

Graphical forecasts from the National Digital Forecast Database for Puerto Rico and Virgin Islands.